Dear Georgia,
Losing your mum at such a young age is really hard, especially when it happens so suddenly and without any warning or the chance to say goodbye. It sounds like you and your mum were very close, so I can understand how much you must miss her, and that at times it feels like a physical pain.
It may help you to read posts from others who like you have lost a parent when they were in their twenties. Here is the link to a topic that got a lot of responses last year (you may have to scroll to the top of the page to read all the posts): Losing a Parent Whilst in Your 20s
I hope that reading other young people’s posts will give you some comfort and direction.
xx Jo